<template>
  <view class="tui-datetime-picker">
    <view
      class="tui-mask"
      :class="{ 'tui-mask-show': isShow }"
      @touchmove.stop.prevent="stop"
      catchtouchmove="stop"
      @tap="maskClick"
    ></view>
    <view class="tui-header" :class="{ 'tui-show': isShow }">
      <view
        class="tui-picker-header"
        :class="{ 'tui-date-radius': radius }"
        :style="{ backgroundColor: headerBackground }"
        @touchmove.stop.prevent="stop"
        catchtouchmove="stop"
      >
        <view
          class="tui-btn-picker"
          :style="{ color: cancelColor }"
          hover-class="tui-opacity"
          :hover-stay-time="150"
          @tap="hide"
        >
          取消
        </view>
        <view
          class="tui-pickerdate__title"
          :style="{ fontSize: titleSize + 'rpx', color: titleColor }"
        >
          {{ title }}
        </view>
        <view
          class="tui-btn-picker"
          :style="{ color: color }"
          hover-class="tui-opacity"
          :hover-stay-time="150"
          @tap="btnFix"
        >
          确定
        </view>
      </view>
      <view class="tui-date-header" :style="{ backgroundColor: unitBackground }" v-if="unitTop">
        <view class="tui-date-unit" v-if="type < 4 || type == 7 || type == 8">年</view>
        <view class="tui-date-unit" v-if="type < 4 || type == 7 || type == 8">月</view>
        <view class="tui-date-unit" v-if="type == 1 || type == 2 || type == 7 || type == 8">
          日
        </view>
        <view
          class="tui-date-unit"
          v-if="type == 1 || type == 4 || type == 5 || type == 7 || type == 8"
        >
          时
        </view>
        <view class="tui-date-unit" v-if="(type == 1 || type > 3) && type != 8">分</view>
        <view class="tui-date-unit" v-if="type > 4 && type != 8">秒</view>
      </view>
      <view
        @touchstart.stop="pickerstart"
        class="tui-date__picker-body"
        :style="{ backgroundColor: bodyBackground, height: height + 'rpx' }"
      >
        <picker-view :value="value" @change="change" class="tui-picker-view">
          <picker-view-column v-if="!reset && (type < 4 || type == 7 || type == 8)">
            <view
              class="tui-date__column-item"
              :class="{ 'tui-font-size_32': !unitTop && type == 7 }"
              v-for="(item, index) in years"
              :key="index"
            >
              {{ item }}
              <text class="tui-date__unit-text" v-if="!unitTop">年</text>
            </view>
          </picker-view-column>
          <picker-view-column v-if="!reset && (type < 4 || type == 7 || type == 8)">
            <view
              class="tui-date__column-item"
              :class="{ 'tui-font-size_32': !unitTop && type == 7 }"
              v-for="(item, index) in months"
              :key="index"
            >
              {{ formatNum(item) }}
              <text class="tui-date__unit-text" v-if="!unitTop">月</text>
            </view>
          </picker-view-column>
          <picker-view-column v-if="!reset && (type == 1 || type == 2 || type == 7 || type == 8)">
            <view
              class="tui-date__column-item"
              :class="{ 'tui-font-size_32': !unitTop && type == 7 }"
              v-for="(item, index) in days"
              :key="index"
            >
              {{ formatNum(item) }}
              <text class="tui-date__unit-text" v-if="!unitTop">日</text>
            </view>
          </picker-view-column>
          <picker-view-column
            v-if="!reset && (type == 1 || type == 4 || type == 5 || type == 7 || type == 8)"
          >
            <view
              class="tui-date__column-item"
              :class="{ 'tui-font-size_32': !unitTop && type == 7 }"
              v-for="(item, index) in hours"
              :key="index"
            >
              {{ formatNum(item) }}
              <text class="tui-date__unit-text" v-if="!unitTop">时</text>
            </view>
          </picker-view-column>
          <picker-view-column v-if="!reset && (type == 1 || type > 3) && type != 8">
            <view
              class="tui-date__column-item"
              :class="{ 'tui-font-size_32': !unitTop && type == 7 }"
              v-for="(item, index) in minutes"
              :key="index"
            >
              {{ formatNum(item) }}
              <text class="tui-date__unit-text" v-if="!unitTop">分</text>
            </view>
          </picker-view-column>
          <picker-view-column v-if="!reset && type > 4 && type != 8">
            <view
              class="tui-date__column-item"
              :class="{ 'tui-font-size_32': !unitTop && type == 7 }"
              v-for="(item, index) in seconds"
              :key="index"
            >
              {{ formatNum(item) }}
              <text class="tui-date__unit-text" v-if="!unitTop">秒</text>
            </view>
          </picker-view-column>
        </picker-view>
      </view>
    </view>
  </view>
</template>

<script>
export default {
  name: 'tuiDatetime',
  emits: ['cancel', 'confirm'],
  props: {
    //1-日期+时间（年月日+时分） 2-日期(年月日) 3-日期(年月) 4-时间（时分） 5-时分秒 6-分秒 7-年月日 时分秒 8-年月日+小时
    type: {
      type: Number,
      default: 1,
    },
    //年份区间
    startYear: {
      type: Number,
      default: 1980,
    },
    //年份区间
    endYear: {
      type: Number,
      default: 2050,
    },
    //显示标题
    title: {
      type: String,
      default: '',
    },
    //标题字体大小
    titleSize: {
      type: [Number, String],
      default: 34,
    },
    //标题字体颜色
    titleColor: {
      type: String,
      default: '#333',
    },
    //"取消"字体颜色
    cancelColor: {
      type: String,
      default: '#888',
    },
    //"确定"字体颜色
    color: {
      type: String,
      default: '#5677fc',
    },
    //设置默认显示日期 2019-08-01 || 2019-08-01 17:01 || 2019/08/01
    setDateTime: {
      type: String,
      default: '',
    },
    //单位置顶
    unitTop: {
      type: Boolean,
      default: false,
    },
    //圆角设置
    radius: {
      type: Boolean,
      default: false,
    },
    //头部背景色
    headerBackground: {
      type: String,
      default: '#fff',
    },
    //根据实际调整，不建议使用深颜色
    bodyBackground: {
      type: String,
      default: '#fff',
    },
    //单位置顶时，单位条背景色
    unitBackground: {
      type: String,
      default: '#fff',
    },
    height: {
      type: [Number, String],
      default: 520,
    },
    //点击遮罩 是否可关闭
    maskClosable: {
      type: Boolean,
      default: true,
    },
  },
  data() {
    return {
      isShow: false,
      years: [],
      months: [],
      days: [],
      hours: [],
      minutes: [],
      seconds: [],
      year: 0,
      month: 0,
      day: 0,
      hour: 0,
      minute: 0,
      second: 0,
      startDate: '',
      endDate: '',
      value: [0, 0, 0, 0, 0, 0],
      reset: false,
      isEnd: true,
    };
  },
  mounted() {
    setTimeout(() => {
      this.initData();
    }, 20);
  },
  computed: {
    yearOrMonth() {
      return `${this.year}-${this.month}`;
    },
    propsChange() {
      return `${this.setDateTime}-${this.type}-${this.startYear}-${this.endYear}`;
    },
  },
  watch: {
    yearOrMonth() {
      this.setDays();
    },
    propsChange() {
      this.reset = true;
      setTimeout(() => {
        this.initData();
      }, 20);
    },
  },
  methods: {
    stop() {},
    formatNum: function (num) {
      return num < 10 ? '0' + num : num + '';
    },
    generateArray: function (start, end) {
      return Array.from(new Array(end + 1).keys()).slice(start);
    },
    getIndex: function (arr, val) {
      let index = arr.indexOf(val);
      return ~index ? index : 0;
    },
    getCharCount(str) {
      let regex = new RegExp('/', 'g');
      let result = str.match(regex);
      return !result ? 0 : result.length;
    },
    //日期时间处理
    initSelectValue() {
      let fdate = this.setDateTime.replace(/\-/g, '/');
      if (this.type == 3 && this.getCharCount(fdate) === 1) {
        fdate += '/01';
      }
      fdate = fdate && fdate.indexOf('/') == -1 ? `2020/01/01 ${fdate}` : fdate;
      let time = null;
      if (fdate) time = new Date(fdate);
      else time = new Date();
      this.year = time.getFullYear();
      this.month = time.getMonth() + 1;
      this.day = time.getDate();
      this.hour = time.getHours();
      this.minute = time.getMinutes();
      this.second = time.getSeconds();
    },
    initData() {
      this.initSelectValue();
      this.reset = false;
      switch (this.type) {
        case 1:
          this.value = [0, 0, 0, 0, 0];
          this.setYears();
          this.setMonths();
          this.setDays();
          this.setHours();
          this.setMinutes();
          break;
        case 2:
          this.value = [0, 0, 0];
          this.setYears();
          this.setMonths();
          this.setDays();
          break;
        case 3:
          this.value = [0, 0];
          this.setYears();
          this.setMonths();
          break;
        case 4:
          this.value = [0, 0];
          this.setHours();
          this.setMinutes();
          break;
        case 5:
          this.value = [0, 0, 0];
          this.setHours();
          this.setMinutes();
          this.setSeconds();
          break;
        case 6:
          this.value = [0, 0];
          this.setMinutes();
          this.setSeconds();
          break;
        case 7:
          this.value = [0, 0, 0, 0, 0, 0];
          this.setYears();
          this.setMonths();
          this.setDays();
          this.setHours();
          this.setMinutes();
          this.setSeconds();
          break;
        case 8:
          this.value = [0, 0, 0, 0];
          this.setYears();
          this.setMonths();
          this.setDays();
          this.setHours();
          break;
        default:
          break;
      }
    },
    setYears() {
      this.years = this.generateArray(this.startYear, this.endYear);
      setTimeout(() => {
        this.$set(this.value, 0, this.getIndex(this.years, this.year));
      }, 8);
    },
    setMonths() {
      this.months = this.generateArray(1, 12);
      setTimeout(() => {
        this.$set(this.value, 1, this.getIndex(this.months, this.month));
      }, 8);
    },
    setDays() {
      if (this.type == 3 || this.type == 4) return;
      let totalDays = new Date(this.year, this.month, 0).getDate();
      totalDays = !totalDays || totalDays < 1 ? 1 : totalDays;
      this.days = this.generateArray(1, totalDays);
      setTimeout(() => {
        this.$set(this.value, 2, this.getIndex(this.days, this.day));
      }, 8);
    },
    setHours() {
      this.hours = this.generateArray(0, 23);
      setTimeout(() => {
        let index = 0;
        if (this.type == 8) {
          index = this.value.length - 1;
        } else {
          index = this.type == 5 || this.type == 7 ? this.value.length - 3 : this.value.length - 2;
        }
        this.$set(this.value, index, this.getIndex(this.hours, this.hour));
      }, 8);
    },
    setMinutes() {
      this.minutes = this.generateArray(0, 59);
      setTimeout(() => {
        let index = this.type > 4 ? this.value.length - 2 : this.value.length - 1;
        this.$set(this.value, index, this.getIndex(this.minutes, this.minute));
      }, 8);
    },
    setSeconds() {
      this.seconds = this.generateArray(0, 59);
      setTimeout(() => {
        this.$set(this.value, this.value.length - 1, this.getIndex(this.seconds, this.second));
      }, 8);
    },
    show() {
      setTimeout(() => {
        this.isShow = true;
      }, 50);
    },
    hide() {
      this.isShow = false;
      this.$emit('cancel', {});
    },
    maskClick() {
      if (!this.maskClosable) return;
      this.hide();
    },
    change(e) {
      this.value = e.detail.value;
      switch (this.type) {
        case 1:
          this.year = this.years[this.value[0]];
          this.month = this.months[this.value[1]];
          this.day = this.days[this.value[2]];
          this.hour = this.hours[this.value[3]];
          this.minute = this.minutes[this.value[4]];
          break;
        case 2:
          this.year = this.years[this.value[0]];
          this.month = this.months[this.value[1]];
          this.day = this.days[this.value[2]];
          break;
        case 3:
          this.year = this.years[this.value[0]];
          this.month = this.months[this.value[1]];
          break;
        case 4:
          this.hour = this.hours[this.value[0]];
          this.minute = this.minutes[this.value[1]];
          break;
        case 5:
          this.hour = this.hours[this.value[0]];
          this.minute = this.minutes[this.value[1]];
          this.second = this.seconds[this.value[2]];
          break;
        case 6:
          this.minute = this.minutes[this.value[0]];
          this.second = this.seconds[this.value[1]];
          break;
        case 7:
          this.year = this.years[this.value[0]];
          this.month = this.months[this.value[1]];
          this.day = this.days[this.value[2]];
          this.hour = this.hours[this.value[3]];
          this.minute = this.minutes[this.value[4]];
          this.second = this.seconds[this.value[5]];
          break;
        case 8:
          this.year = this.years[this.value[0]];
          this.month = this.months[this.value[1]];
          this.day = this.days[this.value[2]];
          this.hour = this.hours[this.value[3]];
          break;
        default:
          break;
      }
      this.isEnd = true;
    },
    selectResult() {
      let result = {};
      let year = this.year;
      let month = this.formatNum(this.month || 0);
      let day = this.formatNum(this.day || 0);
      let hour = this.formatNum(this.hour || 0);
      let minute = this.formatNum(this.minute || 0);
      let second = this.formatNum(this.second || 0);
      switch (this.type) {
        case 1:
          result = {
            year: year,
            month: month,
            day: day,
            hour: hour,
            minute: minute,
            result: `${year}-${month}-${day} ${hour}:${minute}`,
          };
          break;
        case 2:
          result = {
            year: year,
            month: month,
            day: day,
            result: `${year}-${month}-${day}`,
          };
          break;
        case 3:
          result = {
            year: year,
            month: month,
            result: `${year}-${month}`,
          };
          break;
        case 4:
          result = {
            hour: hour,
            minute: minute,
            result: `${hour}:${minute}`,
          };
          break;
        case 5:
          result = {
            hour: hour,
            minute: minute,
            second: second,
            result: `${hour}:${minute}:${second}`,
          };
          break;
        case 6:
          result = {
            minute: minute,
            second: second,
            result: `${minute}:${second}`,
          };
          break;
        case 7:
          result = {
            year: year,
            month: month,
            day: day,
            hour: hour,
            minute: minute,
            second: second,
            result: `${year}-${month}-${day} ${hour}:${minute}:${second}`,
          };
          break;
        case 8:
          result = {
            year: year,
            month: month,
            day: day,
            hour: hour,
            result: `${year}-${month}-${day} ${hour}:00`,
          };
          break;
        default:
          break;
      }
      this.$emit('confirm', result);
    },
    waitFix() {
      if (this.isEnd) {
        this.selectResult();
      } else {
        setTimeout(() => {
          this.waitFix();
        }, 50);
      }
    },
    btnFix() {
      setTimeout(() => {
        this.waitFix();
        this.hide();
      }, 80);
    },
    pickerstart() {
      this.isEnd = false;
    },
  },
};
</script>

<style scoped>
.tui-datetime-picker {
  position: relative;
  z-index: 996;
}

.tui-picker-view {
  height: 100%;
  box-sizing: border-box;
}

.tui-mask {
  position: fixed;
  z-index: 997;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background-color: rgba(0, 0, 0, 0.6);
  visibility: hidden;
  opacity: 0;
  transition: all 0.3s ease-in-out;
}

.tui-mask-show {
  visibility: visible !important;
  opacity: 1 !important;
}

.tui-header {
  z-index: 998;
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  transition: all 0.3s ease-in-out;
  transform: translateY(100%);
}

.tui-date-header {
  width: 100%;
  height: 52rpx;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 26rpx;
  line-height: 26rpx;
  /* #ifdef MP */
  box-shadow: 0 15rpx 10rpx -15rpx #efefef;
  /* #endif */
  /* #ifndef MP */
  box-shadow: 0 15rpx 10rpx -15rpx #888;
  /* #endif */
  position: relative;
  z-index: 2;
}

.tui-date-unit {
  flex: 1;
  text-align: center;
}

.tui-show {
  transform: translateY(0);
}

.tui-picker-header {
  width: 100%;
  height: 90rpx;
  padding: 0 40rpx;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-sizing: border-box;
  font-size: 32rpx;
  position: relative;
}

.tui-date-radius {
  border-top-left-radius: 20rpx;
  border-top-right-radius: 20rpx;
  overflow: hidden;
}

.tui-picker-header::after {
  content: '';
  position: absolute;
  border-bottom: 1rpx solid #eaeef1;
  -webkit-transform: scaleY(0.5);
  transform: scaleY(0.5);
  bottom: 0;
  right: 0;
  left: 0;
}

.tui-date__picker-body {
  width: 100%;
  /* height: 520rpx; */
  overflow: hidden;
}

.tui-date__column-item {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 36rpx;
  color: #333;
}

.tui-font-size_32 {
  font-size: 32rpx !important;
}

.tui-date__unit-text {
  font-size: 24rpx !important;
  padding-left: 8rpx;
}

.tui-btn-picker {
  padding: 16rpx;
  box-sizing: border-box;
  text-align: center;
  text-decoration: none;
  flex-shrink: 0;
  /* #ifdef H5 */
  cursor: pointer;
  /* #endif */
}

.tui-opacity {
  opacity: 0.5;
}

.tui-pickerdate__title {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
  padding: 0 30rpx;
  box-sizing: border-box;
  text-align: center;
}
</style>
